Only a handful of companies actually load 10mm to it's proper powerhouse levels. Underwood being the flagship ammo. Why carry a 6 shot .357 when you can have a Glock 20 with 15rds of 10mm semi-auto. 20 round mag plus are also available. Now with the Gen 5 mos you cent even mount the red dot optic of your choice. IMHO I rather have 15-20 round mag dump on a charging bear than a flimsy 5-6 shot revolver.
There is a reason the 10 MM ammo has been watered down.
With the 10 you are forced into a compromise to run that ammo.
With the powerhouse ammo you start to run into issues with the automatic delivering consistent performance, factory springs and hot loads end up opening early and your power goes away. You need to start using different slide and hammer springs which will beat up the lugs and slide stop - then the lighter stuff wont cycle as well.
The revolver has no issue with the lightest to hottest handholds.
Your "average" 10MM out of a 6" barrel is about 100ft lb shy of what the "average" 357 will deliver.
Between 36 and 59 lb ft is enough to kill a man so it's a significant delta.
As of today I cant get a 15 or a 20 round mag. (perhaps good news on this front?)
To me its 6 vs 10 and I'd rather each one delivery a deadlier blow.
Id wager that in either case one is only going to be able to land 3 or 4 good shots against a charging bear.
It's easier to mount a scope or dot on a 357.
Hard to make a case for them being "flimsy" - if anything a revolver will be tougher and more reliable than an auto.
No one can make a case for the 10 MM being more versatile, you are stuck with one ammo.
Any old 357 can shoot three different power and cost levels of projectile, punching paper is cheap with 38's
In carbine form the 357 delivers FAR more wallop out of an 18 barrel.